Bilingual education involves providing academic content instruction in a student's native and secondary languages. The most common bilingual education models include the following: Early‐Exit Transitional, Late‐Exit Transitional Developmental or Maintenance, Bilingual Immersion, Integrated Transitional Bilingual Education, and Dual Language Immersion. Within each type of program model, there are several options, with varying amounts of time spent on each of the target languages. One‐ way bilingual programs (both the Transitional and Developmental types) can follow several models, such as a 90/10 or 50/50 model. In the 90/10 model, students initially receive 90 percent of the instruction in their native language, which is gradually reduced to about 50 percent by the fifth grade. In the 50/50 model, one or two teachers use both the native language and English in approximately equal amounts of time for instructional purposes throughout the implementation process.